[PATCH] libata: Remove dependence on host_set->dev for SAS

Remove some of the dependence on the host_set struct
in preparation for supporting SAS HBAs. Adds a struct device
pointer to the ata_port struct.

Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 8 insertions, 6 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 94ad4acf8a59..d279666dcb38 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -2856,7 +2856,7 @@ static void ata_sg_clean(struct ata_queued_cmd *qc)
 
         if (qc->flags & ATA_QCFLAG_SG) {
                 if (qc->n_elem)
-                        dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir);
+                        dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
                 /* restore last sg */
                 sg[qc->orig_n_elem - 1].length += qc->pad_len;
                 if (pad_buf) {
@@ -2867,7 +2867,7 @@ static void ata_sg_clean(struct ata_queued_cmd *qc)
                 }
         } else {
                 if (qc->n_elem)
-                        dma_unmap_single(ap->host_set->dev,
+                        dma_unmap_single(ap->dev,
                                 sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
                                 dir);
                 /* restore sg */
@@ -3078,7 +3078,7 @@ static int ata_sg_setup_one(struct ata_queued_cmd *qc)
                 goto skip_map;
         }
 
-        dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt,
+        dma_address = dma_map_single(ap->dev, qc->buf_virt,
                                      sg->length, dir);
         if (dma_mapping_error(dma_address)) {
                 /* restore sg */
@@ -3166,7 +3166,7 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
         }
 
         dir = qc->dma_dir;
-        n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir);
+        n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
         if (n_elem < 1) {
                 /* restore last sg */
                 lsg->length += qc->pad_len;
@@ -4381,7 +4381,7 @@ int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t
 
 int ata_port_start (struct ata_port *ap)
 {
-        struct device *dev = ap->host_set->dev;
+        struct device *dev = ap->dev;
         int rc;
 
         ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
@@ -4414,7 +4414,7 @@ int ata_port_start (struct ata_port *ap)
 
 void ata_port_stop (struct ata_port *ap)
 {
-        struct device *dev = ap->host_set->dev;
+        struct device *dev = ap->dev;
 
         dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
         ata_pad_free(ap, dev);
@@ -4480,6 +4480,7 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
         ap->host = host;
         ap->ctl = ATA_DEVCTL_OBS;
         ap->host_set = host_set;
+        ap->dev = ent->dev;
         ap->port_no = port_no;
         ap->hard_port_no =
                 ent->legacy_mode ? ent->hard_port_no : port_no;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 80c2339da67d..047192253c3a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -400,6 +400,7 @@ struct ata_port {
 
         struct ata_host_stats   stats;
         struct ata_host_set     *host_set;
+        struct device           *dev;
 
         struct work_struct      port_task;